CHAPTER 2 NDA-24296
Page 152
Revision 1.0
PZ-GT20
Industry St andard Architecture Gateway

PZ-GT20

Indu stry St and ard Ar ch ite c tu re Gate wa y

1. General Function

The main function of the PZ-GT20 circuit card is to connect the Industry Standard Arc hitecture (ISA) bus

located on the CPU and the Local I/O bus, permitting the microprocessor on the CPU to control the TSW,

MUX cards of IMG2, 3/6, 7/10, 11/14, 15 via the PH-GT09 card in the TSWM1. This circuit card is used

for the IPX-U/IPX-UMG system.

Figure 2-74 Location of PZ-GT20 (ISAGT)
TSW03
TSW02
TSW01
TSW00
LANI
LANI
LANI
LANI
TSW13
TSW12
TSW11
TSW10
PLO 1
PLO 0
CPU#0 CPU#1
EMA
MMC
PH-GT09
(IOGT1)
PH-GT09
(IOGT0)
PZ-GT13
(ISAGT)
PZ-GT20
(ISAGT) PZ-GT20
(ISAGT)
PZ-GT13
(ISAGT)
ISA BUS
ISA BUS
LPM (IMG0/4/8/12)
GT-BUS
GT-BUS
TSWM#1 (IMG2/6/10/14)
TSWM#0 (IMG1/5/9/13)
TSW03
TSW02
TSW01
TSW00
TSW13
TSW12
TSW11
TSW10
CLK 1
CLK 0
PH-GT09
(IOGT1)
PH-GT09
(IOGT0)
TSW I/O BUS
TSW I/O BUS
IOC/
MISC
MISC